I have Icons they never made any noise they work well i put ome polyurethane bushings and greaseable pins in for more articulation the front bushings are actually for a Toyota.
yes you must get the transmission strategy code off the tag on the side of the transmission by electronic plug or off the valvebody itself and you can update it with forscan if it isn't already.
the only way to eliminate this problem is to upgrade the valve body NexGen .com the factory valve body's suck a new transmission wont solve this problem